Cl 1 Div 2 Group B area Drains

[charlesjuj]

In a Cl 1 Div 2 Group B Hazardous area, Code states I can use boxes not listed for hazardous areas for lighting and non arcing devices. When I hit a low point I will install a Condulet T 27 SA with drain.(1) Will the drain need to be listed for Cl 1 Div 2 Group B? This seems like a costly overkill since the box is a gasketed fitting, and can release any group B gas anyway.
(2)Are there any exceptions to this rule?

 

[bphgravity]

Re: Cl 1 Div 2 Group B area Drains

I believe the code states that the drainage means need only to be approved and not specifically listed, however, I am not completely sure.

 

[Glenn Becnel]

Re: Cl 1 Div 2 Group B area Drains

Charles,
Please reference Article 100 "Labeled" & "Listed". You will need to install the fittings approved (by the manufacturer & accepted by the AHJ) for the atmosphere.
In our refinery we have many Group B (hydrogen process units) areas. We use Crouse-Hinds ECD 16 drain fittings in these units. An ECD 16 complies with Class I, Div 1 & 2, Group B, C & D areas.

 

[rbalex]

Re: Cl 1 Div 2 Group B area Drains

By definition a drain is a fitting:

Fitting. An accessory such as a locknut, bushing, or other part of a wiring system that is intended primarily to perform a mechanical rather than an electrical function.

A fitting is NOT required to be XP unless the enclosure it is attached to is required to be:

501.4(B)(4) Boxes, Fittings, and Joints. Boxes, fittings, and joints shall not be required to be explosionproof except as required by 501.3(B)(1), 501.6(B)(1), and B(501.14)(1)(1).